which
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which

Like which(1) unix command. Find the first instance of an executable in the PATH.

1.3.1  •  Updated 1 years ago  •  by npm  •  ISC License

Like the unix which utility.

Finds the first instance of a specified executable in the PATH environment variable. Does not cache the results, so hash -r is not needed when the PATH changes.

USAGE

var which = require('which')

// async usage
which('node', function (er, resolvedPath) {
  // er is returned if no "node" is found on the PATH
  // if it is found, then the absolute path to the exec is returned
})

// sync usage
// throws if not found
var resolved = which.sync('node')

// if nothrow option is used, returns null if not found
resolved = which.sync('node', {nothrow: true})

// Pass options to override the PATH and PATHEXT environment vars.
which('node', { path: someOtherPath }, function (er, resolved) {
  if (er)
    throw er
  console.log('found at %j', resolved)
})

CLI USAGE

Same as the BSD which(1) binary.

usage: which [-as] program ...

OPTIONS

You may pass an options object as the second argument.

  • path: Use instead of the PATH environment variable.
  • pathExt: Use instead of the PATHEXT environment variable.
  • all: Return all matches, instead of just the first one. Note that this means the function returns an array of strings instead of a single string.

Popularity

Maintenance

Development

Last ver 2 years ago
Created 9 years ago
Last commit 4 months ago
1 month between commits

Technology

Node version: 10.0.0
9.4K unpacked

Compliance

ISC License
OSI Approved
0 vulnerabilities

Contributors

11 contributors
isaacs
Maintainer, 104 commits, 6 merges
Works at npm, Inc.
Nathan Rajlich
2 commits, 1 PRs
Works at zeit
Alex Coomans
1 commits, 1 PRs
Works at Square
Kat Marchán
1 commits, 1 PRs
Works at Microsoft
David Zuelke
1 commits, 1 PRs
Works at heroku
René Schünemann
1 commits, 1 PRs
Works at SAP
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